Apparatus for treating trade effluents.



No. 872,049. PATENTED NOV. 26, 1907.

B. & A. BROADBBNT.

APPARATUS FOR TREATING TRADE EFFLUENTS.

APPLIUATION IILED'IEB. 2, 1907.

UNITED STATES PATENT OFFICE.

BENJAMIN BROADBENT AND ARTHUR BROADBENT, OF LONGWOOD, NEAR HUDDERSFIELD,ENGLAND.

APPARATUS FOR TREATING TRADE EFFLUENTS.

, Specification of Letters Patent.

Patented Nov. 26, 1907'.

Application filed February 2,1907. Serial No. 355,469.

T 0 all whom it may concern:

Be it known that we, BENJAMIN BROAD- BENT and ARTHUR BROADBENT, subjectsof King Edward VII of Great Britain, and residents] of Longwood, near IHuddersfield, in the county of York, England, have invented certain newand useful Improvements in Apparatus for Treating Trade Efl'luents, ofwhich the following description, in connection with the accompanyingdrawings, is a specification.

This invention relates to the treatment of trade effluents or refusesoap suds for recovering or extracting the grease or oil therefrom.

Our improvements consist in combining, in a single sud tank, an acidsprayer or discharge pipe for spraying or discharging into the suds asthey flow to the tank, the required portion of the acid used to crackthe sud, an agitator of suitable construction, and a grease trap havingan outlet pipe for running off the water separated from the denser orsolid bodies, the object of our invention in employing the saidcombination being to extract or recover from the refuse soap suds ortrade effluent, all the grease or oil contained therein and improve andexpedite the process.

The novel features of construction, arrangement and combination will befully described in the subjoined specification and particularly pointedout in the following claims.

Referring to the drawings :Figure 1 is a vertical section of a sud tankhaving our improvements applied thereto, a portion of an adjoining tankbeing also shown at the left hand of the figure; Fig. 2 is a plan viewof the agitator, showing the disposal of the blades;

Fig. 3 is a vertical section, on an enlarged scale, of the grease trap;and Fig. 4 is a cross section of the trap taken as on the line 1, 1., ofFig. 3, looking in the direction of the arrows thereon.

In the accompanying drawings, 1 represents a sud tank to which tradeeffluents or refuse soap suds are supplied by pipe 2 and trough 3.Preferably we arrange, say, three or four tanks side by side and workthem in series, the trough 3 extending over all the tanks so that theeffluent can be directed and discharged into any one tank of the series.

The sulfuric or other acid employed to crack the sud is supplied,preferably from an overhead tank not shown, through the pipe 4, the end4 of which is suitably perforated to cause the acid to be sprayed on tothe refuse sud and as it enters the trough so as to mingle intimatelytherewith. The quantity of acid allowed to mix with. the sud isregulated by the operator according to the density or composition of thesud.

lVhen the mixture of sud and acid has been fed into the tank, theagitators are set in motion. These agitators, of which, in thisinstance, there are two, as 5 and 6, comprise a series of blades 5 (5,secured to a vertical shaft 7 mounted centrally of the tank, one of suchagitators being placed near the bottom of the tank, and the other at aconvenient distance therefrom. The blades 5, 6 of the said agitators arebent, curved or otherwise shaped to cause the sud, they revolve in it,to be carried around and also to be forced in a downward directiontowards the bottom of the tank, so that the sud is sub jccted to athorough agitation to facilitate or hasten the cracking process.

The shaft 7 upon which the agitators 5 and 6 are mounted is rotated byany convenient means. In the arrangement shown, rotation is effected bythe bevel gears 8, 9, and fast and loose pulleys .10, 11, motion beingcommunicated to the said loose pulleys by belt from a line shaft orother source. hen the tank has become full of sud and the operatorjudges by experience or observation, that the sud is thoroughly cracked,the rotation of the agitators is stopped, and the sud allowed to settle.The grease thereupon rises to the top and the heavy impurities sink tothe bottom, leaving an intervening layer of com paratively clear water.This latter is drawn off through a grease trap 12 which comprise ahollow cylindrical chamber extending upwards from the bottom of the tankand having a series of vertical V-shapcd slots or openings 12therothrough.

Iising up to a given distance cent-rally of the trap is a pipe 13controlled by a valve 14 and having an open upper end into which, whenpermitted by the said valve 14, the separated Water passes, and flowsthrough the said pipe to a filter, or away to a drain. The openings 12allow only water to pass into the pipe, the V-shape slots or graduallynarrowing openings 12 preventing the passage of grease to the interiorof the trap.

When the water has been separated from the ciently loose and fluid stateto permit of their gravitating freely through the discharge pipe 15which is controlled by valve 16.

By our improved arrangement and combination of parts we are enabled totreat trade effluents, refuse soap suds, and the like, much moreefliciently and quickly than hitherto, and further we are enabled toperform the whole process in one tank which is a very great advantage.

'Having fully described our said invention, what we claim as new anddesire to secure by Letters Patent is 1. The combination, with a tank,of an outlet valve at the bottom of the said tank for letting out thegrease and impurities, means for mixing acid with the sud, an agitatorarranged in the tank for treating the sud so that it separates intolayers of grease,

water and impurities, and a valved pipe provided with a trap forpreventing the passage of grease into it and projecting into the saidtank above the level of the said outlet valve to tap off the middlelayer of water.

2. The combination, with a tank, of an outlet valve at the bottom of thesaid tank for letting out the grease and impurities, means for mixingacid with the sud, an agitator arranged in the tank for treating the sudso that it separates into layers of grease, water and impurities, a pipeprojecting through the bottom of the tank and having its upperendarranged above the level of the said outlet valve, and a strainerhaving V-shaped openings secured around the upper part of the said pipe.

In testimony whereof we afiix our signatures in the presence of twowitnesses.

BENJAMIN BROADBENQI. ARTHUR BROADBENT.

Witnesses:

FREDERICK I. BRIGHT, THOMAS H. BARRON.

